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Remove Duplicate Lines Free

Remove duplicate lines. Works entirely in your browser. Your files never leave your device.

Open Remove Duplicates Free
No file uploadNo account needed100% privateWorks offlineAlways free

What is Remove Duplicates?

Remove Duplicates is a free browser-based text utility that processes your content instantly in your browser. No data is sent to a server. Works with any text you paste or type, with results appearing in real time.

This tool lets you remove duplicate lines without installing any software or creating an account. Everything runs directly in your browser for maximum privacy. Your files and data never leave your device.

Use it for quick tasks at any time from any device — desktop, tablet or mobile. No subscription, no ads, no limits.

⚡
Instant results
No server processing or wait
🔒
100% private
Files stay on your device
💰
Always free
No subscription or fees
📱
Mobile ready
Works on any device

How to use Remove Duplicates

  1. Paste your list of items — one per line
  2. Choose whether the comparison is case-sensitive or not
  3. Click Remove Duplicates — unique lines are extracted instantly
  4. Copy the deduplicated list

Why use OnlineToolsPlus?

Text tools on OnlineToolsPlus process all content locally in your browser — nothing is transmitted to a server. This means your private documents, legal text, client content and personal writing stay on your device. The tools handle Unicode correctly, support all languages and produce instant results for any text size.

Frequently asked questions

Does it remove duplicates case-sensitively?
By default, comparison is case-sensitive. \'Apple\' and \'apple\' are treated as different. An option to ignore case is available.
Does it preserve the order of lines?
Yes. The first occurrence of each line is kept in its original position. Later duplicates are removed.
Can I deduplicate a list with thousands of entries?
Yes. Paste your list and the tool processes it instantly regardless of length.
What counts as a duplicate?
Lines that are character-for-character identical, including whitespace. A line with a trailing space and the same line without one are not considered duplicates unless whitespace trimming is enabled.
Does it work offline?
Yes.
Can I deduplicate CSV data?
Paste the CSV rows and they are deduplicated line by line. The header row will be kept. Duplicate data rows are removed.

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Last updated: April 11, 2026

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